#==========================================================================
# Description: Build FnNAS Kernel
# Copyright (C) 2025 https://fnnas.com
# Copyright (C) 2026 https://github.com/ophub/fnnas
#==========================================================================

name: Build FnNAS Kernel

on:
  repository_dispatch:
  workflow_dispatch:
    inputs:
      fnnas_base_version:
        description: "Select fnnas base image version"
        required: false
        default: "all"
        type: choice
        options:
          - all
          - amlogic_1252
          - amlogic_693
          - rockchip_1253
          - rockchip_692
          - allwinner_1254
          - allwinner_691
      dtbs_version:
        description: "Set kernel dtbs version"
        required: false
        default: "6.18.y"
        type: choice
        options:
          - 6.18.y
          - 6.12.y
      dtbs_install:
        description: "Install kernel dtbs files"
        required: false
        default: true
        type: boolean
      debs_repo:
        description: "Set fnnas debs repository"
        required: false
        default: "ophub/fnnas"
      debs_install:
        description: "Install kernel debs files"
        required: false
        default: "none"
        type: choice
        options:
          - amlogic
          - allwinner
          - rockchip
          - none

env:
  TZ: Etc/UTC

jobs:
  set-matrix:
    runs-on: ubuntu-26.04-arm
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - name: Set build matrix based on fnnas_base_version input
        id: set-matrix
        run: |
          if [[ "${{ inputs.fnnas_base_version }}" == "all" ]]; then
            MATRIX='{"include":[{"fnnas_base_version":"amlogic_1252","dtbs_version":"6.18.y"},{"fnnas_base_version":"amlogic_693","dtbs_version":"6.12.y"},{"fnnas_base_version":"rockchip_1253","dtbs_version":"6.18.y"},{"fnnas_base_version":"rockchip_692","dtbs_version":"6.12.y"},{"fnnas_base_version":"allwinner_1254","dtbs_version":"6.18.y"},{"fnnas_base_version":"allwinner_691","dtbs_version":"6.12.y"}]}'
          else
            MATRIX='{"include":[{"fnnas_base_version":"${{ inputs.fnnas_base_version }}","dtbs_version":"${{ inputs.dtbs_version }}"}]}'
          fi
          echo "matrix=${MATRIX}" >> "${GITHUB_OUTPUT}"

  build:
    needs: set-matrix
    runs-on: ubuntu-26.04-arm
    if: ${{ github.event.repository.owner.id == github.event.sender.id }}
    permissions:
      contents: write

    strategy:
      matrix: ${{ fromJson(needs.set-matrix.outputs.matrix) }}
    name: build-kernel:${{ matrix.dtbs_version }}@${{ matrix.fnnas_base_version }}

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Initialize the build environment
        id: init
        env:
          DEBIAN_FRONTEND: noninteractive
        run: |
          docker rmi -f $(docker images -q) 2>/dev/null || true
          [[ -n "${AGENT_TOOLSDIRECTORY}" ]] && sudo rm -rf "${AGENT_TOOLSDIRECTORY}"
          sudo rm -rf /usr/share/dotnet /usr/local/lib/android 2>/dev/null
          sudo swapoff -a
          sudo rm -f /swapfile /mnt/swapfile
          sudo apt-get -y update
          sudo apt-get -y purge azure-cli ghc* zulu* llvm* firefox google* dotnet* powershell openjdk* mongodb* moby* || true
          sudo apt-get -y install $(curl -fsSL https://ophub.org/ubuntu2604-make-fnnas-depends)
          sudo systemctl daemon-reload
          #sudo apt-get -y full-upgrade
          sudo apt-get -y autoremove --purge
          sudo apt-get clean
          sudo sed -i '/NVM_DIR/d;/skel/d' /root/{.bashrc,.profile}
          sudo rm -rf ~/{.cargo,.dotnet,.rustup}
          sudo timedatectl set-timezone "${TZ:-Etc/UTC}"
          sudo ntpdate ntp.ubuntu.com 0.pool.ntp.org || true
          sudo timedatectl set-ntp true
          date -u
          timedatectl status || true
          echo "status=success" >> ${GITHUB_OUTPUT}

      - name: Create virtual disk for extended storage
        id: disk
        run: |
          # Get available space in exact GB
          root_avail=$(df --block-size=1G / | tail -1 | awk '{print $4}')
          root_size=$(( root_avail - 4 ))
          [[ "${root_size}" -gt 0 ]] || { echo "Error: Insufficient space on /: ${root_avail}G available"; exit 1; }

          sudo truncate -s "${root_size}"G /root.img
          build_dev=$(sudo losetup --find --show /root.img)
          echo "Using /: ${root_size}G"

          sudo mkfs.xfs -f -i sparse=0 -b size=4096 "${build_dev}"
          sudo mkdir -p /builder
          sudo mount "${build_dev}" /builder
          sudo chown -R runner:runner /builder
          df -Th
          echo "status=success" >> ${GITHUB_OUTPUT}

      - name: Download fnnas image [ ${{ matrix.fnnas_base_version }} ]
        id: down
        working-directory: /builder
        if: (!cancelled())
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "Starting to download the latest FnNAS base image..."
          fnnas_base_version="${{ matrix.fnnas_base_version }}"
          [[ -d "fnnas" ]] || mkdir -p fnnas

          latest_version=$(curl -s \
              -H "Accept: application/vnd.github+json" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              https://api.github.com/repos/ophub/fnnas/releases?per_page=20 | \
              jq -r --arg RTK "fnnas_base_image" \
              --arg BOARD "${fnnas_base_version}" \
              '[.[] | select(.tag_name | contains($RTK))] |
              map(.assets[] | select(.name | contains($BOARD) and endswith(".img.xz"))) |
              sort_by(.updated_at) |
              reverse |
              .[0] |
              {data: .updated_at, url: .url, name: .name}')

          [[ -z "${latest_version}" || "${latest_version}" == "null" ]] && {
              echo "Error: Failed to resolve FnNAS image download URL."
              exit 1
          }

          latest_url="$(echo ${latest_version} | jq -r '.url')"
          fnnas_filename="$(echo ${latest_version} | jq -r '.name')"
          echo "Downloading: ${fnnas_filename}"
          echo "Source: ${latest_url}"

          curl -fsSL \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/octet-stream" \
              "${latest_url}" \
              -o "fnnas/${fnnas_filename}"

          [[ "${?}" -ne "0" ]] && echo "Error: Download failed." && exit 1

          ln -sf /builder/fnnas ${{ github.workspace }}/fnnas
          ln -sf /builder/fnnas /home/runner/work/_actions/ophub/fnnas/main/fnnas

          echo "status=success" >> ${GITHUB_OUTPUT}

      - name: Compile the FnNAS kernel
        uses: ophub/fnnas@main
        if: ${{ steps.down.outputs.status == 'success' && !cancelled() }}
        with:
          build_target: kernel
          fnnas_path: fnnas/*.img.xz
          debs_repo: ${{ inputs.debs_repo }}
          dtbs_version: ${{ matrix.dtbs_version }}
          debs_install: ${{ inputs.debs_install }}
          dtbs_install: ${{ inputs.dtbs_install }}

      - name: Upload Kernel to Release
        uses: ophub/upload-to-releases@main
        if: ${{ env.PACKAGED_STATUS == 'success' && !cancelled() }}
        with:
          tag: kernel_fnnas
          artifacts: ${{ env.PACKAGED_OUTPUTPATH }}/*
          allow_updates: true
          remove_artifacts: false
          replaces_artifacts: true
          make_latest: false
          gh_token: ${{ secrets.GITHUB_TOKEN }}
          body: |
            - FnNAS Dedicated Kernel. Based on official [.debs](https://github.com/ophub/fnnas/releases/tag/fnnas_debs) packages from `fnnas.com`,
              and repackaged into .tar.gz format using the `rekernel` tool.
              It is optimized for batch packaging and supports online updates via the `fnnas-update` command.
            - FnNAS 专用内核。基于 `fnnas.com` 官方提供的 [.debs](https://github.com/ophub/fnnas/releases/tag/fnnas_debs) 安装包，
              利用本仓库的 `rekernel` 工具重新封装为 .tar.gz 格式。
              该内核既适用于批量打包，也支持通过 `fnnas-update` 命令进行在线更新。